I don't know how you could mess up the BB. I've made it many times, and it always comes out very goo. Just make sure you use a decent wine, and you'll be all set. Ina Gartens BB is great. I've made it several times. As has already been suggested, making it ahead of time and then reheating on the day of the party will really help flavors develop.
Have a great time.
I can resist anything, but temptation. Oscar Wilde